public async Task DeleteExpense_WrongIDExpense_ReturnProperlyMessage()
        {
            var testGuidID     = new Guid();
            var ExpenseDeleted = await ExpensesControl.DeleteExpense(testGuidID);

            Assert.AreEqual("Expense with provided ID hasn't been found", ExpenseDeleted.ClientError);
        }
        public async Task DeleteExpense_CorrectData_ReturnSuccessMessage()
        {
            List <Expense> Expenses = await databaseContext.Expenses.ToListAsync();

            var ExpenseDeleted = await ExpensesControl.DeleteExpense(Expenses[0].Id);

            Assert.AreEqual("Expense has been deleted", ExpenseDeleted.SuccessMessage);
        }